Along the interstates, ALDOT treated roadways through Wednesday night and early Thursday. Cloud cover kept temperatures from falling as much as originally forecast, which helped operations, Third Division Engineer Brian Davis said.

However, crews still needed light traffic, sunlight and warmer temperatures for road treatments to continue to work.

Road problems now shift to shaded areas which may not get as much sunlight, leftover moisture that could refreeze in some areas Thursday night and more rural areas north of Birmingham.

Blount County: Emergency management agency states that all roads should be considered dangerous and travel should be avoided. A big problem is Interstate 65 southbound, where an 18-wheeler is blocking Exit 287. Traffic backed up more than two miles.

Cullman County: Road conditions still hazardous and travel should be delayed until at least mid-morning, according to the EMA. Power outages, also.